Plaster supporting structure



Jan. 9, 1934. J. KAHN Er AL PLASTER SUPPORTING STRUCTURE 2 Sheets-Sheet 1 Filed July 29, 1930 Jan. 9, 1934. J K ET AL 1,943,260

PLASTEH SUPPORTING STRUCTURE Filed July 29, 1930 2 Sheets-Sheet 2 1 1 1 x u M A Y Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE v Julius Kahn and Walter F. Schulz, Youngstown, Ohio, assignors to Truscon Steel Company,

Youngstown, Ohio, a

. Application July 29, 1

8 Claims.

In those structures in which a backing sheet of paper with an overlying metal fabric is employed, difficulties are met with due to the action of the wet or green plaster when applied thereto. The sheet absorbing the moisture becomes misshapen and distorted and sags under the weight of the plastic material that is applied thereto. The fabric overlying the same will not prevent this and where woven wire mesh material is used it is found to slip and itself become distorted, so that it actually adds to the derogatory effects to which the backing sheet is subjected.

The object of the present invention is to provi'de a combination of elements that will obviate the above difficulties by providing in connection with a backing sheet with which the plaster will key, a lathing member that will not only be embedded in the plaster, but will form a rigid un- 20 yielding support for holding the backing sheet to shape and formation when and after the wet plaster is applied, thereby insuring a finished wall structure which though thin, is rigid, permanent and without defect.

A further and important object is to provide a structure in which the joints between a plurality of the sheets are bridged, thereby materially overcoming the tendency of the plaster to crack along the lines of such joints.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein: Y

Figure 1 is a face view of a plaster supporting member, portions being broken away in order to illustrate it in relatively large size.

Figure 2 is a sectional view on the line 2-2 of Figure 1.

Figure 3 is a detail sectional view on the line 3-3 of Figure 1.

Figure 4 is a view in elevation of a plurality of the sheets in place and showing the bridging of the joints between them.

Figure 5 is a. sectional view of a slightl fled form of construction.

In the embodiment disclosed, a backing sheet or board is employed of corrugated formation. That is to say, it comprises a rear layer 4, to one side of which is attached a corrugated layer 5. This is preferably of paper and is of well known character. As a consequence the board has a rear fiat face and a corrugated front face. The board or at least the corrugated sheet thereof is waterproofed. Overlying the corrugated front face is a relatively coarse open-mesh fabric 6 of expanded metal. This fabric lies against the y modicorporation of Michigan 930. Serial No. 471,522

crests of the corrugations and is preferably so situated that certain of the parts? where the integral portions connect the strands of the metal, are against the ridges or crests of the corrugations. As will be clear by reference to Figures 2 and 5 the strands are substantially flatfaced ribbons and are set on edge with respect to the corrugations so as to outstand therefrom. This, it will be observed, gives a material amount of space for the plaster to key and provides good holding surfaces. It will also be noted that where the strands join, the width at the junction is doubled and at these points the fasteners 8 hereafter mentioned are located. Embracing such parts are staples 8 that are shown as located longitudinally of the corrugations, these staples passing through the backing sheet or board and being riveted over the rear faces, as indicated in Figure 3. It will .be noted particularly by reference to Figure 3 that at the points of securement, the portions '7 of the fabric cause the ridges of the corrugations to be inset so that they are actually interlocked or interfitted with the backing sheet, and as a consequence serve to assist the stamples in preventing any tendency of the open-mesh fabric to move or become displaced on the backing sheet. It Will of course be understood that'the location and arrangement of the staples or'fasteners may be different from that disclosed. It will also be noted by reference to Figures 1, 2 and 3 that the metal fabric is illustrated as extending beyond two edges of the sheet, these portions being designated 9. It will therefore be evident that when a number of these sheets are fastened to studding or other supports, as shown in Figure 4, the metal fabric will overlie the margins of adjacent sheets and bridge the joints between said sheets, thereby providing lathing over the joints.

It will be understood that this projection of the expanded metal may be beyond one or more of the edges of the backing sheet.

It will be clear that when this structure is applied by nailing or otherwise to studding, joists and'the like, with the expanded metal exposed, a lathing structure is provided for the reception of a coat of plaster. This plaster filling in the grooves of the corrugations, will form ribs behind the metal, the metal being also embedded in. the plaster coat, and thus producing a complete entity that is strong and rigid though relatively thin. In this connection it will be. clear that with the use of a corrugated backing sheet the tendency of the wet plaster is to soften. the paper and cause the corrugations to flatten out section except that an additional layer 5a of corrugated board is employed behind the front board, thereby providing additional air spacebehind the plaster wall.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

What we claim, is:

1. A plaster supporting'structure, comprising a backing sheet having a corrugated surface, and

a sheet of expanded metal overlying the corrugated surface and secured to the backing sheet, said sheet of expanded metal having substantially fiat faced strands located on edge with relation to the corrugations and extending across the corrugations and the spaces between them.

2. A plaster supporting structure comprising a backing sheet having a corrugated surface, and a sheet of expanded metal overlying the cormgated surface and secured to the backing sheet, said expanded metal having its integrally connected strands each extending diagonally across a plurality of the corrugations and said strands being held by their integral connections in rigid relation.

3. A plaster supporting structure comprising a backing sheet having a corrugated outer surface, an open mesh expanded metal fabric overlying the corrugated face of the sheet, and staples embracing the integral intersections of the strands of said fabric and engaged in the sheet to hold the sheet and fabric together.

4. A plaster supporting structure comprising a. backing sheet having a corrugated outer surface, an open mesh fabric that overlies the corrugated face and rests against the crests of the corrugations thereof, and staples securing the fabric to the sheet, said staples lying longitudinally over the crests of the corrugations and embracing the intersecting portions of the strands of the fabric.

5. As an article of manufacture, a plaster supporting structure comprising a backing sheet having a corrugated surface, fabric of expanded metal overlying the corrugated surface and including integral strands, each of which extends diagonally across a plurality 'of corrugations, certain of said diagonal strands projecting beyond the edge thereof to overlie the margin of an adjacent sheet and bridge the joint between the' strands, each strand extending diagonally across a plurality of the waterproof corrugations, said expanded metal sheet being secured to the backing sheet and said expanded metal comprising substantially flat faced strands that are substantially on edge and outstand from the corrugations.

'7. A plaster supporting structure comprising a backing sheet having a corrugated surface, a sheet of expanded metal overlying the corrugated surface and having integral strands between their points of intersection' extended diagonally across and each lying against a plurality of the corrugations, and consisting of a substantially flat faced strand set on edge and outstanding from said corrugations and means securing together the expanded metal sheet and the backing sheet. a

8. A plaster supporting structure comprising a' corrugated sheet, a substantially fiat sheet secured to the rear side of the corrugated sheet and constituting a backing therefore, and a front sheet of expanded open mesh metal fabric secured to the front side of the corrugated sheet and having integrally connected strands extend- 

